Page 17
FIGURE 5
TWO−STAGE, VARIABLE SPEED INTEGRATED CONTROL BOARD
THERMOSTAT CONNECTIONS (TB1)
1/4" QUICK CONNECT TERMINALS
DIP SWITCH FUNCTIONS
INDOOR
BLOWER DIP
SWITCHES
HEATING
DIP
SWITCHES
DIAGNOSTIC
LEDs
ON−BOARD
LINKS
H= 24V HUMIDIFIER OUTPUT
L= LENNOX SYSTEM OPERATION MONITOR
1= FUTURE USE
NEUTRALS= 120 VAC NEUTRAL
W914
W951
W915
HTG DIP SWITCH(ES) FUNCTION
5 and 6 Cooling Mode Blower Speed
7 and 8 Blower Speed Adjustment
9 and 10 Cooling Mode Blower Ramping Profile
11 and 12 Heating Mode Blower Speed
1 T’stat Heat Stages (single or two−stage)
2 Second Stage ON Delay (single−stage t’stat)
3 and 4 Heating Fan OFF Delay
INDOOR BLOWER
DIP SWITCH(ES)
FUNCTION
1
16
5
12
1
4
ON
ON
9
8
FUTURE
USE
TABLE 12
SureLight Board 5 Pin Terminal Designation
PIN # Function
1 Ignitor
2 Combustion Air Inducer High Speed
3 Combustion Air Inducer Low Speed
4 Combustion Air Inducer Neutral
5 Ignitor Neutral
TABLE 13
SureLight Board 12Pin Terminal Designation
PIN # Function
1 Gas Valve High Fire
2 Second Stage Prove Switch
3 Rollout In
4 Ground
5 24V Hot
6 Primary Limit In
7 Gas Valve Low Stage
8 Gas Valve Common
9 24V Neutral
10 Ground
11 Rollout Switch Out
12 1st Stage Prove Switch
TABLE 14
SureLight Board 16 Pin Blower Control Terminals
PIN # Function
1 Ground
2 Low Heat Speed
3 Ground
4 DELAY" Dip Switch Selection
5 COOL" Dip Switch Selection
6 Y1" Signal
7 ADJUST" Dip Switch Selection
8 Ground
9 0" From Thermostat
10 DS" Output Signal
11 HEAT" Dip Switch Selection
12 24 VAC
13 HIGH HEAT Speed
14 Y2" Signal
15 G"
16 CFM LED
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